threat. >>> she has dined with the the queen. a member of rupert murdoch's circle is out on bail after being arrested earlier today. elizabeth palmer shows us it is not only today's bombshell in this widening case. rebecca brooks willingly made an appointment to go to the police station today to answer questions. when she arrived she was arrested. >> it will become a formal part of the criminal inquiry. >> reporter: brooks' arrest came as a surprise. this was a shock. >> this morning i informed the palace and secretary and mayor of my intention to resign as commissioner of the metropolitan police service. >> reporter: the powerful head of london's police force resigned. not because is he personally suspected of wrongdoing but it was on his watch that the former news of the world editor neil wallace was hired as a p.r. consultant to the police. he has since been arrested in connection with hacking. when this scandal exploded two weeks ago no one dreamed how many powerful people would be dragged in and down. in the u.s. les hinton publisher of the wall street journal resigned on friday.